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• W2570693566 abstract "Antibody single-chain variable fragments (scFvs) are used in a variety of applications, such as for research, diagnosis and therapy. Essential for these applications is the extraordinary specificity, selectivity and affinity of antibody paratopes, which can also be used for efficient protein purification. However, this use is hampered by the high affinity for the protein to be purified because harsh elution conditions, which may impair folding, integrity or viability of the eluted biomaterials, are typically required. In this study, we developed a strategy to obtain structural elements that provide allosteric modulation of the affinities of different antibody scFvs for their antigen. To identify suitable allosteric modules, a complete set of cyclic permutations of calmodulin variants was generated and tested for modulation of the affinity when substituting the linker between VH and VL. Modulation of affinity induced by addition of different calmodulin-binding peptides at physiologic conditions was demonstrated for 5 of 6 tested scFvs of different specificities and antigens ranging from cell surface proteins to haptens. In addition, a variety of different modulator peptides were tested. Different structural solutions were found in respect of the optimal calmodulin permutation, the optimal peptide and the allosteric effect for scFvs binding to different antigen structures. Significantly, effective linker modules were identified for scFvs with both VH-VL and VL-VH architecture. The results suggest that this approach may offer a rapid, paratope-independent strategy to provide allosteric regulation of affinity for many other antibody scFvs." @default.
• W2570693566 created "2017-01-13" @default.
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• W2570693566 date "2017-01-05" @default.
• W2570693566 modified "2023-09-27" @default.
• W2570693566 title "A strategy to identify linker-based modules for the allosteric regulation of antibody-antigen binding affinities of different scFvs" @default.
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• W2570693566 doi "https://doi.org/10.1080/19420862.2016.1277302" @default.
• W2570693566 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5384732" @default.
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• W2570693566 hasPublicationYear "2017" @default.
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